1. Definition of HPMC
HPMC (Hydroxypropyl Methyl Cellulose) is a non-ionic cellulose ether widely used in building materials, medicine, food, daily chemicals and other industries. In dry-mixed mortar, AnxinCel®HPMC is mainly used as a thickener, water-retaining agent and modifier, which can significantly improve the construction performance of mortar.
2. The role of HPMC in dry-mixed mortar
The main functions of HPMC in dry-mixed mortar are as follows:
Water retention: HPMC can absorb water and swell, forming a hydration film inside the mortar, reducing the rapid evaporation of water, improving the hydration efficiency of cement or gypsum, and preventing cracking or strength loss caused by excessive water loss.
Thickening: HPMC gives the mortar good thixotropy, making the mortar have appropriate fluidity and construction properties, and avoiding water seepage and sedimentation caused by water separation.
Improve construction performance: HPMC improves the lubricity of mortar, making it easier to apply and level, while enhancing adhesion to the substrate and reducing powdering and hollowing.
Extend open time: AnxinCel®HPMC can slow down the evaporation rate of water, extend the operable time of mortar, make construction more flexible, and is particularly suitable for large-area application and high-temperature construction environments.
Anti-sagging: In vertical construction materials such as tile adhesives and putties, HPMC can prevent the material from sliding down due to its own weight and improve construction stability.
3. Application of HPMC in different dry-mixed mortars
HPMC is widely used in various types of dry-mixed mortars, including but not limited to:
Masonry mortar and plastering mortar: improve water retention, prevent mortar cracking, and improve adhesion.
Tile adhesive: enhance adhesion, improve construction convenience, and prevent tiles from slipping.
Self-leveling mortar: improve fluidity, prevent stratification, and enhance strength.
Waterproof mortar: improve waterproof performance and increase the density of mortar.
Putty powder: improve construction performance, enhance scrub resistance, and prevent powdering.
4. HPMC selection and use precautions
Different mortar products have different requirements for HPMC, so the following factors need to be considered when selecting:
Viscosity: Low-viscosity AnxinCel®HPMC is suitable for self-leveling mortar with good fluidity, while high-viscosity HPMC is suitable for putty or tile adhesive with high water retention requirements.
Solubility: High-quality HPMC should have good solubility, be able to disperse quickly and form a uniform solution without agglomeration or agglomeration.
Addition amount: Generally, the addition amount of HPMC in dry-mixed mortar is 0.1%~0.5%, and the specific proportion needs to be adjusted according to the performance requirements of the mortar.
HPMC is an important additive in dry-mixed mortar, which can improve the construction performance, water retention and adhesion of mortar. It is widely used in masonry mortar, plastering mortar, tile adhesive, putty and other products. When selecting HPMC, it is necessary to match the appropriate viscosity and formula according to the specific application scenario to ensure the best construction effect.
Post time: Mar-25-2025